Thermodynamic cycle method for prime mover on basis of correct timing constant volume combustion mode

Abstract

The invention provides a thermodynamic cycle method for a prime mover on the basis of a correct timing constant volume combustion mode. In thermodynamic cycle, a multistage compression interstage cooling process, a countercurrent flow heat exchange process, a correct timing constant volume combustion process and an adiabatic expansion process are included, and thermal energy is converted into mechanical energy in the thermodynamic cycle. Compression power consumption is reduced through the multistage compression interstage cooling process; through the countercurrent flow heat exchange process, enthalpy of working media to be exhausted to the external environment originally is recycled and used for the thermodynamic cycle, and the utilization rate of the thermal energy is improved; through the correct timing constant volume combustion process, long-time uniform low-temperature constant volume combustion is achieved, generation of harmful pollutants such as HC, CO, PM and NOx is effectively suppressed, and meanwhile combustion efficiency is improved; through the adiabatic expansion process, pressure after expansion is approximate to ambient pressure, and work is fully done in an expanding mode. The method provides orientation for design of efficient low pollutant emission and high-performance prime movers in future.

Description

technical field [0001] The invention relates to a prime mover, in particular to a thermodynamic cycle method based on a prime mover in a timing and constant volume combustion mode. Background technique [0002] Improving the efficiency of the prime mover and reducing emissions have an important positive effect on saving resources and protecting the environment. Through the improved cycle process and combustion organization, the efficiency of the prime mover can be improved and the emission of harmful pollutants can be reduced. [0003] The cycle of a typical internal combustion engine generally includes three types of thermodynamic cycles: the first type, the constant volume combustion cycle is also called the Otto cycle, and its heat release process is similar to the constant volume combustion process. Gasoline engines generally use this cycle method, and the cycle process includes isentropic Compression process, isovolumic combustion process, isentropic expansion process ...

AI Technical Summary

Problems solved by technology

The third is the Stirling cycle. The cycle process includes isothermal compression process, isothermal combustion process, isothermal expansion process, and isothermal exothermic process. The working medium absorbs heat from a high-temperature heat source during the isothermal expansion process. Heat release to a low temperature heat source, inefficient due to its combustion temperature and regenerator limitations

Although the existing relevant patents have elaborated on interstage cooling of multi-stage compression and energy recovery of exhaust gas, the heating process cannot realize the real constant pressure and then constant volume heating, so the thermal power conversion efficiency is not high, and it is also difficult to adapt to industrial conditions. Situation changes

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